Information processing device

An information processing device comprising a processor configured to:

• acquire original data collected and prepared over a predetermined period using a sensor mounted on a vehicle;
• extract data to be used to calculate a damage rate of an electric oil pump from the original data;
• and
• execute a search process including:
• a first step of calculating, for each of a plurality of feature quantities included in the original data, a relative frequency distribution in the original data,
• a second step of setting a plurality of time windows for cutting out data for a part of a period of the original data such that a period obtained by totaling periods of all the time windows is shorter than the predetermined period,
• a third step of cutting out data from the original data using the time windows,
• a fourth step of calculating, for each of the plurality of feature quantities, a relative frequency distribution in extracted data obtained by combining the data cut out using the time windows, and
• a fifth step of calculating an error between the relative frequency distribution in the original data and the relative frequency distribution in the extracted data, wherein
• the original data includes data on a rotational speed of the electric oil pump as the plurality of feature quantities;
• and
• the processor is further configured to extract the extracted data whose error is equal to or less than a threshold by executing the search process that repeatedly makes trials to execute the second step to the fifth step while changing settings of the time windows after executing the first step.